layout « struct « C Data Type Q&A

1. C struct memory layout?    stackoverflow.com

I have C# background. Very newbie to low level language like C. In C#, struct's memory laid out by compiler by default. Compiler can re-order data fields or pad additional bits between ...

2. How to deal with C structs with runtime determined layouts?    stackoverflow.com

In my code, I need to deal with one of two structs that share almost all of the members, but their offsets can only be determined at runtime. Something like:

struct type1 {int ...

3. Can we make assumptions over structs layouts?    stackoverflow.com

Is there any convention over the algorithm used to make the layouts of structs on C? I want to be able to have a code running in a vm to be able ...

4. struct memory layout    bytes.com

5. structure layout question    bytes.com

Greetings, Why does the C standard require the members of a structure not be re-ordered (6.2.5.20)? Padding is allowed, and platform dependent, which means one cannot rely on the exact layout anyway, so what's the point? Without this restriction the compiler could layout the structure in the most efficient way possible, for some definition of efficient. It would be easy enough ...

6. Member layout of structures and type convertions    bytes.com

Suppose, I have two customized types here: typedef struct { int dt_qual; int dec_exp; int dec_pos; int dec_ndgts; /* char dec_dgts[8]; */ } datetime; typedef struct { int dt[4]; /* [6] */ } dtime; 1. Can value of variables of these two types above be transformed each other correctly always? Suppose I copy bytes from variable typed datetime to variable typed ...